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High viscosity primer

a primer and high viscosity technology, applied in the field of primers, can solve the problems of low viscosity primers, prone to dripping, spilling, and otherwise separating from the surface of the object to be adhered, unintentional and undesirable staining and discoloration of the surroundings, etc., and achieves high viscosity and high viscosity. , the effect of high viscosity

Inactive Publication Date: 2018-05-24
OATEY CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent is about a high viscosity primer that is used to prepare a surface for solvent cement bonding. The primer is designed to at least partially dissolve the surface it is applied to, and it contains a thickener that helps to dissolve the surface. The high viscosity primer has a viscosity of between 10 and 100 centipoise (cP) and is made up of a solvent and a polymer thickener present in a range of amounts. The thickener can be chemically matched with the surface being prepared. The high viscosity primer can be used in a solvent cement system that includes a high viscosity primer and a solvent. The system helps to bond plastic objects together.

Problems solved by technology

Thus, these low viscosity primers are prone to dripping, spilling, and otherwise separating from the surface of the object to be adhered.
The combination of the dye with conventional low viscosity primers can lead to unintentional and undesirable staining and discoloration of the surroundings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0038]The following examples illustrate exemplary embodiments and features of various high viscosity primers encompassed by the general inventive concepts. The examples are given solely for the purpose of illustration and are not to be construed as limiting the present disclosure, as many variations thereof are possible and also encompassed by the general inventive concepts.

[0039]In order to more thoroughly describe this invention, the following working examples are provided. In these examples, the high viscosity primers made in accordance with this invention were applied prior to testing an Oatey® PVC Heavy Duty Clear Cement solvent cement (Oatey Co., Cleveland, Ohio) for a two hour lap shear strength and a two hour hydrostatic burst pressure test, both in accordance with ASTM D2564. For the two hour lap shear test, the high viscosity primer was applied to test chips, followed by application of the solvent cement prior to curing of the primer, and bonding of the test chips. The bon...

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Abstract

A high viscosity primer and a process for preparing a polymer surface for solvent cement bonding are disclosed. The high viscosity primer has at least one solvent capable of at least partially dissolving or softening the surface and comprising a thickener ethylcellulose, PVC resin, polyvinylpyrrolidone (PVP) resin, acrylic resin, acrylonitrile butadiene styrene (ABS), pentaerythritol ethoxylate, or a combination thereof and present at a concentration in a range of from about 0.5 wt % to about 10 wt %, relative to the total weight of the primer. The high viscosity primer has a viscosity in a range of from about 10 to about 100 centipoise.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Application No. 62 / 167,952, filed May 29, 2015, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates to primers used in solvent cementing. Particularly, the invention relates to high viscosity primers for use in preparing a surface for solvent cement bonding.BACKGROUND OF THE INVENTION[0003]Primers are used in the solvent cement process to help prepare plastic pipes, fittings, surfaces, and other articles or objects for solvent cementing or adhesion by cleaning and softening the object to maximize adhesion once a solvent based adhesive is subsequently applied. The pipes, fittings, or other objects being adhered are typically made from PVC (polyvinyl chloride), CPVC (chlorinated polyvinyl chloride), ABS (acrylonitrile-butadiene-styrene) and other thermoplastics or polymers. Before applying a solvent cement, the surfaces to b...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09J101/28C09J127/06C09J5/02B05D3/00
CPCC09J101/28C09J127/06C09J5/02B05D3/002C09J2205/306C09J2401/003C09J2427/003C09J2433/003C09J2455/003C09J139/06C09J155/02C09J2301/504
Inventor PARHAR, AMRITPEREZ, WILLIE
Owner OATEY CO
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